How CranialSpark started their logo design journey

Summary

Look at the top 2 if you cant top them please dont submit. They look like the direction I want to go.

Company name

CranialSpark

What inspires you and how do you envision the design for your business?

Idea is to inspire people to start using their brains, Sparking them back into active use instead of being mindless sheep. :)

Wants

Skulls and brains are ok, Id like option of both bright cartoony and some a little more dark and edgy. I know thats two different extremes. Its going to come down to what grabs me. interesting slogans accepted aswell

Don't want

No gore or blood.
Id really like to stay away from the "web 2.0" style that everyone uses